10120102012021 has 4 divisors (see below), whose sum is σ = 10121466466252. Its totient is φ = 10118737557792.

The previous prime is 10120102011997. The next prime is 10120102012043. The reversal of 10120102012021 is 12021020102101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3886161682225 + 6233940329796 = 1971335^2 + 2496786^2 .

It is a cyclic number.

It is not a de Polignac number, because 10120102012021 - 2¹¹ = 10120102009973 is a prime.

It is a super-2 number, since 2×10120102012021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10120102011992 and 10120102012010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10120102012081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 682215990 + ... + 682230823.

It is an arithmetic number, because the mean of its divisors is an integer number (2530366616563).

Almost surely, 2^{10120102012021} is an apocalyptic number.

It is an amenable number.

10120102012021 is a deficient number, since it is larger than the sum of its proper divisors (1364454231).

10120102012021 is an equidigital number, since it uses as much as digits as its factorization.

10120102012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1364454230.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10120102012021 its reverse (12021020102101), we get a palindrome (22141122114122).

The spelling of 10120102012021 in words is "ten trillion, one hundred twenty billion, one hundred two million, twelve thousand, twenty-one".